QT File writing with arrays - c++

Question

Im trying to read from csv file into another file. There aren't any errors, I just don't understand why it is not writing into the file. Any help is appreciated. Im very new to QT.
QString arr[581][6];
while (!file.atEnd()) {
QByteArray line = file.readLine();
for (int i=0; i<581; i++){
for(int j=0; j<6; j++){
arr[i][j]=line;
}
}
}
QString Hfilename="c:\Data.txt";
QFile fileH( Hfilename );
if ( fileH.open(QIODevice::ReadWrite) )
{
QTextStream stream( &fileH );
for (int i=0; i<581; i++){
for(int j=0; j<6; j++){
stream<<arr[i][j]<<endl;
}
}
}

Answer 1

Based on the code you provided, please find a working example for the write step (you specified that the read step is alrady working):
#include <QCoreApplication>
#include <QFile>
#include <QTextStream>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QString arr[3];
arr[0] = "xxxxxx";
arr[1] = "yyyy";
arr[2] = "zzzz";
QString Hfilename="/home/jhondoe/toto.txt";
QFile fileH( Hfilename );
if ( fileH.open(QIODevice::ReadWrite) )
{
QTextStream stream( &fileH );
for (int i=0; i<3; i++){
stream << arr[i] << endl;
}
}
return a.exec();
}
What changed:
I (my user account) has sufficient rights to write into the output file
If you work on Windows, as #igor-tandetnik said, you have to use double backslashes as separator. You can also use QDir::separator() as native separator for your file path.